劳动就业问题的实质是（）物质资料再生产不能合理配置。
参考答案：人口再生产同
—Hi! I'm Carol. Nice to meet you.
—Hi! I'm Jean. ______[ ]
A. How are you?
B. How old are you?
C. Nice to meet you, too.
在△ABC中，若∠A∶∠B=5∶7，∠C- ∠A=10°，则∠C等于[ ]
A.75°
B.60°
C.50°
D.40°
